Playing The Guitar

As a beginner, my husband and I are debating over buying a fender mustang at Guitar Center for my son. When he showed interest in playing the guitar, we were both elated because he'll be doing something else than sitting in front of his computer or playing games on his console. When he learned the basics, he started saving up for an electric guitar. He asked his dad for the fender mustang and he easily said yes. I'm still not so sure if we should get that because the guitar thing might wear off later on. Hubs doesn't think so because the boy is investing on his equipment. Should I give in?